The overlapping of personal work experiences can be explained as follows. For example, if you work in a certain unit, you can take the self-study exam to improve your education, you can work in a certain unit from a certain month to a certain month, you can take the self-study exam of a certain major in a certain university, and you can also serve as a consultant in other units during your work in a certain unit, all of which can be handled according to the above.